hey i was wondering if my betta has a disease? i recently acquired him after my brother moved so i don't know what he used to look like. when i got him he was in a tiny fish bowl and his fins were in really poor shape, so i moved him into a bigger tank and started treating the torn fins with aquarium salt (looks much better than he used to already but his front bottom fins are still healing) but i'm a little concerned about the weird greenish/brownish tinge his fins have. is that normal or does he have some sort of infection?

Housing
What size is your tank? 2.5
Does your tank have a filter? no
Does your tank have an air stone or other type of aeration? no
Is your tank heated? no
What tank mates does your betta fish live with? none

Food
What type of food do you feed your betta fish? aqueon betta food pellets
How often do you feed your betta fish? once a day

Maintenance
How often do you perform a water change? once a week
What percentage of the water do you change when you perform a water change? 100%
What type of additives do you add to the water when you perform a water change? aquarium salt, water primer

Symptoms and Treatment
How has your betta fish's appearance changed? tinged green/brown, not sure if its natural, and has some gold flecks on the scales when viewed under light
Have you started treating your fish? If so, how? thought it might be velvet so currently treating it with a low dosage of coppersafe than the instructions say just to be on the safe side; have been treating it for 2 weeks
Does your fish have any history of being ill? no
How old is your fish (approximately)? 1.5 years